I was reading this on the comcast forum on dslreports:
http://www.broadbandreports.com/forum/r28669599-Speed-PSA-Slow-WiFi-on-Comcast-May-be-Comcasts-Fault
It seems there may be issues with how comcast marks packets entering our routers that may cause the wireless driver to send them as lowest priority. I am not sure if it affects the asus routers yet, but I have added the iptables rule mentioned in the posts to test.
http://www.broadbandreports.com/forum/r28669599-Speed-PSA-Slow-WiFi-on-Comcast-May-be-Comcasts-Fault
It seems there may be issues with how comcast marks packets entering our routers that may cause the wireless driver to send them as lowest priority. I am not sure if it affects the asus routers yet, but I have added the iptables rule mentioned in the posts to test.